Caeyosso lambdin



(No Model.)

- O. LAMBDIN.

ELECTRIC SIGNAL SYSTEM.

Patented Mar. 29, 1887.

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UNITED STATES PATENT OFFrcE.

OARVOSSO LAMBDIN, OF WILMINGTON, NORTH CAROLINA.

ELECTRIC SIGNAL SYSTEM.

SPECIFICATION forming part of Letters Patent-No. 360,025, dated March29, 1887.

Application filed August 23, 1886. Serial No. 211,668.

To all whom it may concern.-

Be it known that I, CARVOSSO LAMBDIN, a citizen of the United States,and a resident of Vilmington, in the county of New Hanover and State ofNorth Carolina, have invented certain new and useful Improvements inElectric Signal Systems, described, claimed, and shown in the followingspecification, claims, and drawings.

The invention relates to a device for giving signals, and may beemployed in telephony, in hotel signal systems, in fire-alarm systems,the push-button being replaced by a thermostat, or in any similardepartments of electrical engineering.

The invention consists of the combination of elements, as hereinaftermore fully and accurately described and claimed.

In order to illustrate the practical manner of carryingout theinvention,and to enable others skilled in the art to which the inventionappertaius to make and use the same, drawings are hereunto annexed anddescribed, in which similar letters represent corresponding elements,and in which each part referred to is designated by a single character.

Figure 1 shows a view, partly in diagram, of the circuits andelectromagnetic devices. The main circuit is distinguished by alternateheavy dashes and dots, while the local circuit is rep resented by fineshort dashes. Fig. 2 shows a detail view.

By the term gear audits derivativcsis to be understood the idea of anoperating connection, whether by toothed wheels, by levers, by ratche tsand pawls, or by any similar means usually employed for communicating orchecking motion.

The system consists of the combination of an electric bell, A, orsimilar signal, whose operating-magnet B is in a local circuit, C, aratchet-wheel, D, geared to the armature E of said magnet, a secondmagnet, F, in a main circuit, G, containing a magnet, F, an armature, H,therefor, having operating connection by means of a catch, 1, with adrop, J, or circuit-closer, said circuit-closer gearing into saidratchet-wheel, and projections K, additional to the teeth of said wheelgearing with said drop by means of the extensions J, (see Fig. 2,) butnot with the armature of the (N0 model.)

first magnet, said projections having a rigid connection with saidratchet-wheel.

There is but one battery, L, from the poles of which pass both the maincircuit and the local circuit, so called because located at theoperating-instruments themselves, while the main circuit is supposed toextend to a distant station, where there is a circuit-closer such as apush-button, M. Strictly speaking, they are branch circuits to eachother.

The ratchet-wheel is provided with the usual spring, N, pawl O, andratchet-wheel P, to prevent motion of wheel D in but one direction, thedirection of motion being indicated by an arrow.

The one circuit, G, passes from the battery to the push-button M,through the magnet F, and back to the battery L. The other circuitpasses from the same battery, through the bellmagnet 13, through theratchet -wheel D, through the drop J, normally open, as shown dotted,and back to the battery, the said ratchet-wheel being of electricalconducting material.

The vibrator or gong-lever Q, which carries armature E, is pivoted atits lower end, and has a projection, R, provided with a pawl, S, whichgears into the ratchet-wheel D. Referring particularly to Fig. 2, whichis a top View, principally, of the ratchet'wheel D, the additionalprojections K, above referred to, may be seen. They project from awheel, T, located rigidly upon the same axle U as that of theratchet-whcel D. The said projections K are longer than the teeth V ofthe ratchetwheel. There may be but one of the projections,or there maybe several, according to the nature of the signal to be given; but thereshould not be a greater number than there are teeth upon theratchet-wheel. The wheel shown has four.

hen the push-button M, normally open and of ordinary internalconstruction, is operated so as to close the circuit G, the magnet Fattracts the armature H and releases the drop J, as shown in full lines.The extension J of this drop falls upon the ratchet-wheel D and closesthe circuit C, which passes through the magnet B, so as to attract thearmature E. This attraction causes the bell to ring and simultaneouslyrotates the wheel. The cirsion J.

cuit thereby becomes broken at the exten- The armature E and ratchet Sare pulled back by the retractile spring W. The circuit is again closedat the extension J, which falls upon the next tooth in order. The bellagain rings, the wheel again rotates, and the circuit C is again brokenand again closed, and so on until one of the projections K comes againstthe extension J and replaces the drop J uponthe catch I. Successivepushes of the button would sound the bell the same numberof times, theprojections K being equally distant upon the circumference of the wheelT. The momentum of the part Q is sufficient to carry the wheel D thedistance of one tooth, although the circuit at the point J is onlymomentarily broken. V

The invention is not limited to the preciseconstructionhereinbeforcdescribedandshown, as it is evident that manymodifications may be made therein without departing from the spirit ofthe invention. projections K need not be equally spaced; also, that thedrop J may serve as a shutter or visual signal of an annunciator. Whenin its lower position, it would indicate a call from the person at thepush-button M.

Having now stated the title, object, and na ture of the said invention,having described its practical realization by reference to theaccompanying drawings, and having particularly ascertained the manner inwhich the same operates to accomplish the said object, what I considerto be novel and original, and therefore claim as my invention, is-

1. In an electric signal system, the combination of a main circuit andlocal circuit, both normally open, the said main circuit being providedwith a circuit-closer and electromagnet, the local circuit including abellmagnet, a make-and-break wheel geared to the bell-magnet armature orstriker, a circuitcloser normally restrained by the armature of themain-circuit magnet and making contact when tripped with themake-and-break wheel, and a device connected with said wheel forautomatically resetting the circuit-closer and thereby breaking thelocal circuit at the termination of the signal, substantially as and forthe purposes set forth.

2. In an electric signal system, the combi- It is evident that thenation of amain or signaling circuit and a local or receiving. circuit,both normally open and containing but one battery, an annunciatorincluded in the local circuit, a normallyrestrained circuit-closer forsaid latter circuit, and an electro-magnet included in the main circuitfor tripping said circuit-closer, substantially as and for the purposesset forth.

3. In an electric signal system, the combination of a main or signalingcircuit and a local or receiving circuit, both normally open andcontaining but one battery, an annunciator included in the localcircuit, a normallyrestrained circuit-closer for said circuit, an

electro-magnet included in the main circuit,

for tripping said circuit-closer, and a resetting device for the circuitcloser, operated by and connected with the annunciator mechanism,substantial] y as and for the purposes set forth.

4. In an electric signal system, the combination of a main and'localcircuit, the former containing a push-button and magnet and the latter acombined drop, and a circuit-closer.

having operating connection with the armature of'said magnet and gearinginto aratchetwheel which is geared to an electromagnetic rotating andalarm or signal device located in said local circuit, said rotatingdevice being provided with an automatic local-circuit breaker,substantially as and for the purpose described.

5. In an electric signal system, the combination of a main circuitcontaining an electromagnet, a local circuit containing an electricbell, and a ratcheted make-and-breakwheel having an actuating pawlconnected with the bellhammer or armature, a circuit-closer normallyrestrained by the main-circuit magnet, but adapted to rest upon theratchet-wheel when tripped, and a second wheel connected with theratchetwheel axle and provided with fewer teeth than said ratchet-wheelfor raising and resetting the circuit-closer drop, substantially as andfor the purposes set forth.

"Witness my signature this 3d day of Au gust, 1886.

GA RVOSSO LAMBDIN.

\Vitnesscs;

IV. R. SHAW, WM. L. SMITH, Jr.

